Type ABZ Modules

The Type ABZ is a popular LoRaWAN modem developed and sold by Murata. The module combines STMicro's STM32 L0 microcontroller (ARM Cortex-M0+ core) with Semtech's SX1276 LoRa transceiver. The module is available in two hardware configurations that differ in the MCU model used:

1. STM32L082 (Type ABZ-078)
2. STM32L072 (Type ABZ-091, Type ABZ-093, Type ABZ-102, Type ABZ-104)

STM32L082 has hardware AES-128 acceleration, STM32L072 does not. Both configurations offer 192 KB of flash, 20 KB of SRAM, and 6 KB of EEPROM.

The modules can be purchased with or without proprietary firmware. The variants that include firmware may not be user-reprogrammable. The reprogrammable variants are known as "OpenMCU". The open firmware from this Github repository can only be programmed into Type ABZ modules with an open MCU. As of 2022, Murata offers the following firmware variants:

1. Type ABZ-078 (OpenMCU, no firmware)
2. Type ABZ-091 (OpenMCU, no firmware)
3. Type ABZ-093 (Murata Modem firmware)
4. Type ABZ-102 (Comcast MachineQ firmware)
5. Type ABZ-104 (Semtech firmware, pre-provisioned for LoRa Cloud)

Our AT command interface is designed to be largely compatible with the AT interface of the proprietary Murata Modem firmware included in Type ABZ-093. The documentation for that AT interface is available from myMurata. Accessing the documentation on myMurata requires an activation code which can be purchased together with the STMicro Discovery Kit.